Question about 2003 Oldsmobile Alero

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Security light is flashing. car will not start on my 2003 oldsmobile alero

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I OWN a 2001 Olds Alero and the same thing happens to mine.. It's an easy fix..
1. Turn the Key to ACC (keep it in this mode for the entire 10 minutes).
2. The security light on the Dashboard will flash for exactly 10 minutes..
3. Once the 10 mins are over, the security light will stay solid..
Wait for the red light to disappear off the dashboard...
YOU ARE NOW READY TO TURN YOUR CAR OFF AND RESTART YOU CAR....

SIMPLE FIX..
I DO THIS ALL THE TIME TO MINE..

Posted on Nov 20, 2012

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  • 57 Answers

Turn the key to the on posistion (don't try to start it) leave it on for about 10 minutes or until the security light stops flashing. Turn the key off for a second or 2. It should start now. The problem is the body control module. It can be replaced or bypassed/overridden with instructions found on the internet. Hope this helps.

Posted on Nov 06, 2012

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Posted on Jan 02, 2017

edwardjwoods
  • 372 Answers

SOURCE: Security light in 99 Oldsmobile Alero

There isnt a fuse for the theft system. You need to take the coloum cover off. Should be 3 screws and you will see all the wires in there. The ones you need are three togather. White Black and Yellow. Get the car started and cut the yellow wire. The theft light will come on and stay on but will bypass the theft system. If it is a 2 wire system you will see two little metal strips on the upper side of the key. You have to use a ohm meter and measure the resistance of the strip in there. Its a resistor used to tell the theft computer the key is in there. Anyway find out what the resistance is and buy a resistor from radio shack and look under the steering wheel for the 2 very small guage wires in a yellow cover....NOTE not the air bag wires. Simply cut those wires ( the 2 white ones) and on the set going away from the steering wheel strip the wires and put the resistor one one wire and the other end of it to the other wire....That will disable that system. If its the 2 wire and you have issues getting it simply take the car to a car audio place that does remote starts and for a nominal fee they will do it for you. My records show that it has the 3 wire system.

Posted on Sep 16, 2008

csmock132
  • 4669 Answers

SOURCE: 2000 Alero Security light flashing and wont start

With the new lock cylinder in it, turn the key on. The security light should blink. Leave the key on for 10 minutes, the security light will quit blinking and go out after 10 min. This will reprogram your security system and the car should start. Also leave a battery charger on it while the key is on, If the battery goes dead during the 10 minute reprogram sequence, you will have to start over again.

Posted on Mar 08, 2009

  • 401 Answers

SOURCE: We need to reset the computer on a 2003 Oldsmobile Alero

HI there if the scan tool you are using will not reprogram the theft module the try the 10 min relearn

  1. Turn ON the ignition, with the engine OFF.
  2. Attempt to start the engine, then release the key to ON (vehicle will not start).
  3. Observe the SECURITY telltale, after approximately 10 minutes the telltale will turn OFF.
  4. Turn OFF the ignition, and wait 5 seconds.
  5. The vehicle is now ready to relearn the Passlock™ Sensor Data Code and/or passwords on the next ignition switch transition from OFF to CRANK. Important: The vehicle learns the Passlock™ Sensor Data Code and/or password on the next ignition switch transition from OFF to CRANK. You must turn the ignition OFF before attempting to start the vehicle.
  6. Start the engine. The vehicle has now learned the Passlock™ Sensor Data Code and/or password.
  7. With a scan tool, clear any DTCs if needed. History DTCs will self clear after 100 ignition cycles

Posted on May 03, 2009

mechanicm639
  • 253 Answers

SOURCE: car wont start has power has fuel and starter

The security system is activated. It kills the injector pulse ( signal) and on some modles the starter. You will need to try to relearn the system. First try to start the car, leave the key in the run position for 10 minutes. Cycle the key off, then cycle it to the run position again for 10 more minutes. Cycle it off again, then back to run for another 10 min. after the last cycle turn it off then try to start the car. It is a 30 minute relearn. If this does not work you will need a repair shop to replace the passlock sensor. Good Luck

Posted on Jul 08, 2009

Testimonial: "it was in the ignition and the security activated i had to replace the whole igintion key and all "

  • 15 Answers

SOURCE: i have a 2001 olds alero, the car wont start and

If the previous solution doesn't work, try this:

While the key is in "on" position and your security light is blinking, it is probably your "Passlock" security device acting up. Very common in these years for GM cars. To test if this is it, simply turn your key forward (to "on" position) until light stops blinking and eventually turns off (right around 10 minutes). Then, turn key back off, and then try to restart it. My Alero did this just a few months ago and I learned this trick as I was pricing out a new fuel pump. If this was your problem, I recommend taking it to a remote starter installer and have them by-pass the passlock system permanently. This should cost anywhere from $40-$100, but is much better than a new fuel pump and filter cost.
-note: I recommend not getting it by-passed until it happens a second time (which it may not), just don't forget the temporary fix!

Posted on Jan 14, 2010

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1 Answer

Car wont crank


My 2003 Oldsmobile alero does this on occasion. Turn the key over just to the on position, not the acc (all the way) position. You will see the security light blinking during this time. After ten minutes, the light will stop flashing and you can now turn the key OFF and then crank the car. It's annoying but so simple.

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If the security light keeps flashing,you might as well do a reset.
Be sure to turn off all the accesories including the radio before you start the process.
Insert the key to the ignition switch and turn the key to ON position without starting the car.
leave it ON until the flashing light (security) stops.It will take approximately 15 to 20 minutes.
As soon the flashing stop,turn the key to OFF
position and start the cart.
Hope this help.

Jul 23, 2011 | 2003 Oldsmobile Alero

1 Answer

Well driving my 2003 oldsmobile alero a light came on the dash (security) what dose this mean


Will the vehicle restart if it is shut off? The security flashing light usually indicates a passlock issue with the key or the passlock.

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1 Answer

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if security light is flashing turn ignition switch to run position but do not try to start light will be flashing let vehicle sit for about ten or fifteen mins. light will stop flashing when it does start car you have just reset security system

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2 Answers

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i have the same problem with 04 turn your key until the lights on the dash come on and see of the security light is flashing if so wait about 10 min for the security system to reset as soon as the light stops flashing turn the key off then your car should start right up

Jun 14, 2010 | 2003 Oldsmobile Alero

2 Answers

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Im not sure if you got your alero to start yet. But heres an Idea, The alero comes with a security feature that if you have 3 failed starts it activates. a good sign of this is while having the key turned does your security light flash on the dash. if so turn the key forward with out starting the car and leave it on for 10 minutes and then the security light on the dash should stop flashing. Now turn the key off and remove key stick key backin and turn over to start car. Did your car start ??

May 10, 2010 | 2003 Oldsmobile Alero

1 Answer

My 2001 alero dont start. the security light came on. I will like to know if the security light is what is not letting the car start


if your security light flashing it will not start. you let it flash for 10 to 15 min then it should stop. turn the key off then try to start the car. if it does start you need a ignition lock cylinder

Jan 24, 2010 | 2001 Oldsmobile Alero

2 Answers

2003 Oldsmobile Alero Elec. Problems


the Body Control Module is bad. If your security light goes off later then most likely.

Mar 16, 2009 | 2003 Oldsmobile Alero

3 Answers

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When the vehicles security light is flashing and the car won't start..put the key in the ON position and wait until the security light stops flashing and then turn OFF and then start. this is from a security glitch and it shuts down the gas so car won't start. Good luck!!

Nov 05, 2008 | 2003 Oldsmobile Alero

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